JP5119868B2 - Electric dust collector - Google Patents

Description

  The present invention relates to an electric dust collector for collecting airborne particulate matter and cleaning the air.

  Conventionally, this type of electrostatic precipitator is composed of a charging unit that generates corona discharge and charges suspended particulate matter in the air, and a dust collecting portion that collects suspended particulate matter in the air. For example, the thing like patent document 1 is known.

  Hereinafter, the electric dust collector will be described with reference to FIG. In the charging unit 101, discharge electrodes 102 having various shapes (for example, lines, thorns, needles, etc.) and a ground electrode plate 103 made of a thin metal plate are alternately stacked. In the dust collection portion 105, load electrode plates 106 made of metal thin plates and ground electrode plates 107 made of metal thin plates are alternately laminated. A high voltage is applied to the discharge electrode 102 from the power source 104 to generate a corona discharge between the ground electrode plate 103 and a high voltage is applied to the load electrode plate 106 from the power source 104 to form an electric field between the ground electrode plate 107. Is formed. The suspended particulate matter in the air is charged by corona discharge in the charging unit 101 and is attached to and collected on the ground electrode plate 107 by an electric field in the dust collection unit 105 to perform air cleaning.

In an electrostatic precipitator that processes a large amount of air (for example, 300 m ³ / min per unit), the size per unit increases from the amount of air that is treated, so that the ground electrode plate 103, the load electrode plate 106, and the ground electrode used As the size of each plate 107 is increased, the number of used plates is large, and thus the weight is increased.

For this reason, in order to reduce the weight as much as possible, the thickness of the ground electrode plate 103, the load electrode plate 106, and the ground electrode plate 107 is reduced, or the ground electrode plate 107 of the dust collecting portion 105 as in Patent Document 1 is used. A punching hole 108 was provided.
Japanese Patent Laid-Open No. 11-057531

  In such a conventional electrostatic precipitator, if the thickness of the electrode plates is made too thin for weight reduction, the rigidity is lost and it becomes difficult to maintain the distance between the electrode plates, and if too many holes are provided in the electrode plates Since the conductive portion is reduced and the electric field strength is weakened, there is a problem that the dust collection function is deteriorated in any case.

  In addition, when spark discharge occurs in the charged part and dust collection part, and the suspended particulate matter is flammable, the temperature rises abnormally, and the electrode plate is deformed by heat and the durability life is shortened. In order to avoid this problem, if the applied voltage is lowered or the distance between the electrode plates is increased, the dust collection function is deteriorated.

  The present invention solves such a conventional problem and reduces the weight while maintaining the dust collection function, further suppresses the occurrence of spark discharge, and prevents the temperature from rising abnormally. The purpose is to provide a machine.

Electrostatic precipitator of the present invention, in order to achieve the above object, the ground electrode plate of the charging unit, three-layer film sandwiching the second film of the electrical conductivity between the first film of semiconductive two The electrode plate is provided with a surface exposed portion of the second film, and a current-carrying plate electrically connected to the high voltage power source is brought into contact with the surface exposed portion, so that the second film is electrically connected to the high voltage power source. The volume resistivity of the first film is 10 ⁹ to 10 ¹² Ω · cm, the volume resistivity of the second film is 10 ⁴ Ω · cm or less, and each film has a thickness of 100 to 500 μm. It is. By this means, it is possible to reduce the weight as compared with the metal electrode plate while maintaining the dust collecting function. Further, by bringing the surface exposed portion into contact with the energizing plate, the potential of the electrode plate can be reliably conducted to the high voltage power source. In addition, it is possible to suppress the occurrence of spark discharge in the charging portion while maintaining the dust collection function.

  Another means is that a three-layer film of an electrode plate is exposed to a surface composed of only two layers of one first film and one second film with a predetermined width parallel to at least one side end face. A part is provided. Thereby, the surface exposure part of a three-layer film can be formed easily.

  Moreover, the other means formed the surface exposure part by cutting off at an angle of 5-30 degrees with respect to the surface direction of a 3 layer film in the end surface of at least 1 side of the 3 layer film of an electrode plate. It is. Thereby, the surface exposure part of a three-layer film can be easily formed by post-processing.

  Another means is a structure in which a frame is provided around the three-layer film of the electrode plate, and an energization plate is sandwiched between the frames. Thereby, an electrode plate can be assembled easily.

Also, other means, the ground electrode plate of the charging portion is constituted by a three-layer film sandwiching the second film of the electrical conductivity between the first film of semiconductive two, three layers of the electrode plate film by inserting the energizing rod electrically connected to cause the high-voltage power supply perpendicular or parallel to the surface direction of the current bar is brought into contact with the second film, the second film so as to electrically conduct the high voltage source, the The volume resistivity of one film is 10 ⁹ to 10 ¹² Ω · cm, the volume resistivity of the second film is 10 ⁴ Ω · cm or less, and any film has a thickness of 100 to 500 μm . By this means, it is possible to reduce the weight as compared with the metal electrode plate while maintaining the dust collecting function. Further, by inserting three layers fill beam energization rod, it is possible to conduct the potential of the electrode plate to ensure high power. In addition, it is possible to suppress the occurrence of spark discharge in the charging portion while maintaining the dust collection function.

  As another means, the current-carrying rod has a conical shape with a sharp tip, and is inserted into a wedge shape with respect to the three-layer film. Thereby, the electric potential of an electrode plate can be reliably conducted with a high voltage power supply.

  Another means is that a frame is provided around the three-layer film of the electrode plate, and at least the same number of screws as the current-carrying rods are provided on the frame. It was inserted in a wedge shape. Thereby, the electric potential of an electrode plate can be reliably conducted with a high voltage power supply.

  The other means is that both the first film and the second film are polyvinylidene fluoride resins, and the electric resistance of each film is adjusted by mixing an ionic conductive agent into the base material. A three-layer film is formed by heat welding. Thereby, the adhesiveness of a three-layer film can be made more reliable.

  ADVANTAGE OF THE INVENTION According to this invention, while maintaining a dust collection function, weight reduction is achieved, Furthermore, generation | occurrence | production of spark discharge can be suppressed, and the electrical dust collector which has the effect of preventing abnormal temperature rise can be provided.

  In addition, there is an effect that the potential of the electrode plate is reliably conducted to the high-voltage power source and the reliability is improved.

  In addition, there is an effect that the adhesion of the three-layer film is further ensured and the reliability is improved.

  In addition, the processability and assemblability are improved, and the manufacturing cost is reduced.

According to the first aspect of the present invention, any one or more of the ground electrode plate of the charging portion, the load electrode plate of the dust collection portion, and the ground electrode plate of the dust collection portion is composed of two insulating or semi-conductive plates. A current-carrying plate composed of a three-layer film in which a conductive second film is sandwiched between conductive first films, and the electrode plate is provided with a surface exposed portion of the second film and electrically connected to a high-voltage power source. Since the second film is brought into electrical contact with the high-voltage power source while maintaining the dust collection function, the weight of the second film is reduced compared to the metal electrode plate. Is brought into contact with the current-carrying plate, so that the potential of the electrode plate is reliably conducted to the high-voltage power source. Moreover, the volume resistivity of the first film is 10 ⁹ to 10 ¹² Ω · cm, the volume resistivity of the second film is 10 ⁴ Ω · cm or less, and any film has a thickness of 100 to 500 μm. While maintaining the dust collection function, it has the effect of suppressing the occurrence of spark discharge in the charging portion.

  According to a fourth aspect of the present invention, the three-layer film of the electrode plate is composed of only two layers of one first film and one second film with a predetermined width parallel to the end face of at least one side. Since the exposed surface exposed portion is provided, the surface exposed portion of the three-layer film can be easily formed.

  In the invention according to claim 5 of the present invention, the surface exposed portion is obtained by obliquely cutting the end surface of at least one side of the three-layer film of the electrode plate at an angle of 5 to 30 ° with respect to the surface direction of the three-layer film. Thus, the surface exposed portion of the three-layer film can be easily formed by post-processing.

  According to the sixth aspect of the present invention, since the frame is provided around the three-layer film of the electrode plate and the current plate is sandwiched between the frames, the electrode plate can be easily assembled.

According to a fifth aspect of the present invention, at least one of the ground electrode plate of the charging portion, the load electrode plate of the dust collection portion, and the ground electrode plate of the dust collection portion is composed of two insulating or semi-conductive plates. A current-carrying rod composed of a three-layer film having a conductive second film sandwiched between conductive first films and electrically connected to a high-voltage power supply perpendicularly or parallel to the surface direction of the three-layer film of the electrode plate By connecting the current-carrying rod to the second film and electrically connecting the second film to the high-voltage power supply, the dust collection function is maintained and the weight is reduced compared to the metal electrode plate. aim, also, by plugging into three layers fill beam energization rod has the effect that conduct the potential of the electrode plate to ensure high power. Moreover, the volume resistivity of the first film is 10 ⁹ to 10 ¹² Ω · cm, the volume resistivity of the second film is 10 ⁴ Ω · cm or less, and any film has a thickness of 100 to 500 μm. While maintaining the dust collection function, it has the effect of suppressing the occurrence of spark discharge in the charging portion.

  According to the tenth aspect of the present invention, the current-carrying rod has a conical shape with a sharp tip, and is inserted in a wedge shape with respect to the three-layer film, so that the potential of the electrode plate is reliably conducted to the high-voltage power source. Have

  According to the eleventh aspect of the present invention, a frame is provided around the three-layer film of the electrode plate, the frame is provided with at least as many screws as the number of current-carrying rods, and the current-carrying rods are screwed into the screws. The wedge film is inserted into the layer film so that the potential of the electrode plate is reliably conducted to the high voltage power source.

  In the twelfth aspect of the present invention, each of the first film and the second film is a polyvinylidene fluoride resin, and the electric resistance of each film is adjusted by mixing an ionic conductive agent into the base material. Since the three-layer film is formed by heat-welding each film, it has an effect that the adhesion of the three-layer film can be ensured.

  Embodiments of the present invention will be described below with reference to FIGS.

(Embodiment 1)
FIG. 1 is a configuration diagram of an electric dust collector showing Embodiments 1 to 4 of the present invention, and FIG. 2 is a perspective view of a charging unit and a dust collector showing Embodiments 1 to 4 of the present invention.

  As shown in FIG. 1, the duct 1 includes a charging unit 11 that charges floating particulate matter in the air, and a dust collecting unit 21 that collects the charged suspended particulate matter. A blower 2 (as an example, an axial fan) for drawing air containing suspended particulate matter into the duct 1 is provided downstream. A high voltage power source 3 supplies a high voltage to the charging unit 11 and the dust collecting unit 21.

  FIG. 2 is a perspective view of the charging unit 11 and the dust collecting unit 21. The charging unit 11 is electrically connected to the ground side and the discharge electrode 12 electrically connected to the positive electrode side of the high-voltage power supply 3. The ground electrode plates 13 are alternately arranged, and the dust collector 21 is a ground electrode plate electrically connected to the ground side and the load electrode plate 22 electrically connected to the positive electrode side of the high-voltage power source 3. 23 are alternately arranged. The shape of the discharge electrode 12 may be any shape that is easy to discharge, such as a line shape, a thorn shape, or a needle shape, and the material is conductive such as a metal such as stainless steel or tungsten, a conductive paint, a conductive film, or the like. Any substance is acceptable. Moreover, although the discharge electrode 12 and the load electrode plate 22 are connected to the positive electrode side of the high-voltage power supply 3, they may be connected to the negative electrode side with respect to the ground electrode.

  In FIG. 2, air flows through the gap between the discharge electrode 12 and the ground electrode plate 13 of the charging unit 11 and the gap between the charge electrode 22 and the ground electrode 23 of the dust collection unit 21 as indicated by arrows. The suspended particulate matter in the air is charged by the corona discharge generated between the electrode 12 and the ground electrode plate 13, and is charged by the electric field generated between the load electrode plate 22 and the ground electrode plate 23 in the dust collection portion 21. The suspended particulate matter adheres to the ground electrode plate 23 and is collected by the Coulomb force. As a result, airborne particulate matter in the air can be collected and air purified.

3, in Figures 1 and 2, the electrode plate comprising a three-layer film 31 for use in the ground electrode plate 1 3 of the charging unit 11 is a detailed view and a cross-sectional view showing the first embodiment. The electrode plate not using the three-layer film 31 may be a metal plate such as stainless steel or aluminum.

  In FIG. 3, the three-layer film 31 is configured by sandwiching a second film 33 between two first films 32. Here, as the material of the first film 32 and the second film 33, both are polyvinylidene fluoride resins (hereinafter referred to as PVDF). PVDF is excellent in heat resistance, ozone resistance, chemical resistance, oil resistance, etc., and can ensure sufficient durability, and the volume resistivity is different by mixing ionic conductive agent into the film base material Multiple types of films can be produced. In general, as a means of adjusting the volume resistivity, there is a method of mixing a conductive filler such as carbon, but this method easily causes dielectric breakdown at the carbon particle portion when a high voltage is applied to the resin material, and the dielectric breakdown. Since there is a disadvantage that the voltage is low, in the first embodiment, a method of mixing an ionic conductive agent in place of the conductive filler such as carbon is used as a means for solving this. As a result, the first film 32 and the second film 33 having different volume resistivity can be manufactured with the same kind of resin material, and heat is applied to the first film 32 and the second film 33 to melt the contact surface and thereby heat-contact the three-layer film. The adhesion of 31 is improved, and the reliability of the three-layer film 31 with respect to “peeling” can be greatly improved.

When the three-layer film 31 is used for the ground electrode plate 13 of the charging unit 11, the volume resistivity of the first film 32 is 10 ⁹ to 10 ¹² Ω · cm, and the volume resistivity of the second film 33 is 10 ^4. Ω · cm or less, and any film has a thickness of 100 to 500 μm.

The second film 33 in the charging unit 11 has a function of collecting and conducting current when corona discharge is performed in the charging unit 11. However, when the volume resistivity is higher than 10 ⁴ Ω · cm, the second film 33 is used when the current flows. Since 33 itself has a large amount of heat generation due to Joule heat, it is set to 10 ⁴ Ω · cm or less. The thickness is preferably 100 to 500 μm. If the thickness is less than 100 μm, the second film 33 itself generates heat due to Joule heat when the current flows. If the thickness is more than 500 μm, the weight of the second film 33 becomes heavy and the weight is reduced. Can no longer contribute.

The first film 32 in the charging unit 11 serves to suppress the occurrence of spark discharge when corona discharge is performed in the charging unit 11. Normally, if the surface of the ground electrode plate 13 is conductive, when air breakdown occurs during corona discharge, the electrical resistance of the air at that location approaches zero as much as possible, current flows intensively and spark discharge occurs. appear. On the other hand, if the surface of the ground electrode plate 13 is covered with the first film 32 having electric resistance, if the dielectric breakdown of the air occurs during corona discharge, the electric resistance of the air at that location is infinitely zero. Even when approaching, the resistance of the first film 32 is in series, so there is little difference in resistance compared to the resistance of other places (air resistance + film resistance), and the current is dispersed and concentrated in one place The occurrence of spark discharge can be prevented without current flowing. It is appropriate that the volume resistivity of the first film 32 at this time is 10 ⁹ to 10 ¹² Ω · cm, and the thickness is 100 to 500 μm.

The reason will be described below. Even if the volume resistivity is the same, if the thickness changes, the resistance to the current flowing in the thickness direction of the film changes. Therefore, considering the resistance per unit area with respect to the current flowing in the thickness direction of the film (that is, the product of volume resistivity and thickness, hereinafter referred to as area resistivity Ω · cm ² ), the present inventors have determined this area resistance. It has been found that it is optimal that the rate is 10 ⁸ to 10 ¹⁰ Ω · cm ² . For example, a volume resistivity of 1 × 10 ¹⁰ to 1 × 10 ¹² Ω · cm is optimal for a film having a thickness of 100 μm, and a volume resistivity of 2 × 10 ⁹ to 2 × 10 ¹¹ Ω · cm is optimal for a film having a thickness of 500 μm. It becomes. If this area resistivity is less than 10 ⁸ Ω · cm ² , current flows easily and corona discharge occurs, but spark discharge also occurs. Conversely, if it is greater than 10 ¹⁰ Ω · cm ² , spark discharge does not occur. There is no discharge. As an example of the optimum design, the area resistivity of the first film 32 may be 1 × 10 ⁹ Ω · cm ² (the volume resistivity is 2.5 × 10 ¹⁰ Ω · cm and the thickness is 400 μm).

From the above, maintaining thereby prevent an abnormal rise in temperature in advance, the dust collecting function without widen the plate spacing or lowering the applied voltage by suppressing the occurrence of Oite spark discharge charging unit 1 1 However, by making the electrode plate into the three-layer film 31, it is possible to achieve a significant weight reduction as compared with the metal electrode plate.

  Since the three-layer film 31 does not have rigidity alone, as shown in FIG. 3, the periphery is sandwiched between frames 34 (frame A 34a, frame B 34b) as rigid bodies, and bolts and nuts (not shown) are inserted into four holes 35. It is fastened by passing it through to maintain rigidity. This method makes it possible to easily assemble the electrode plate. The frame 34 may be a metal or a resin as long as it has rigidity.

  On the other hand, regardless of how the electrode plate is used, the second film 33 needs to be electrically connected to the high-voltage power source 3, and in the first embodiment, the three-layer film 31 has at least one end face. The exposed surface portion 36 is formed in parallel with the first exposed film 36 and has a predetermined width (for example, 10 mm) and is formed of only two layers of one first film 32 and one second film 33. The conductive energizing plate 37 is brought into contact with the surface exposed portion 36 of the second film 33, and is further sandwiched from both sides by the frame A34a and the frame B34b. At least one end of the energizing plate 37 protrudes to the outside of the frame 34 as an energizing terminal 38, and the energizing terminal 38 is connected to the high-voltage power source 3 via a lead wire (not shown) or the like, whereby the second film 33 is It is possible to ensure conduction to the high-voltage power supply 3. Thereby, reliability can be improved.

  In the first embodiment, when the total width dimension of the three-layer film 31 is B = 200 mm and the width dimension of the surface exposed portion is 10 mm, among the total width 200 mm, the width 190 mm has a three-layer configuration, and the width 10 mm has a two-layer configuration. The three-layer film 31 can be easily formed at a low cost by producing a long film and cutting the film into a predetermined length (for example, 400 mm) in the longitudinal direction.

(Embodiment 2)
4, in FIGS. 1 and 2, the electrode plate comprising a three-layer film 31 for use in the ground electrode plate 1 3 of the charging unit 11 is a detailed view and a cross-sectional view showing a second embodiment. The same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted. The electrode plate not using the three-layer film 31 may be a metal plate such as stainless steel or aluminum.

  In FIG. 4, the three-layer film 31 is configured by sandwiching a second film 33 between two first films 32. Here, as a material of the first film 32 and the second film 33, a polyvinylidene fluoride resin having a thickness of 100 to 500 μm is used. The periphery of the three-layer film 31 is sandwiched between rigid frames 34 (frame A34a, frame B34b) such as metal or resin, and fastened by passing bolts and nuts (not shown) through four holes 35, Maintains rigidity.

  The second film 33 needs to be electrically connected to the high-voltage power supply 3. In the second embodiment, α = 5 with respect to the surface direction of the three-layer film 31 at the end surface of at least one side of the three-layer film 31. The surface exposed portion 36 is formed by cutting obliquely at an angle of ˜30 ° (α = 25 ° in the second embodiment). The conductive energizing plate 37 is brought into contact with the surface exposed portion 36 of the second film 33, and is further sandwiched from both sides by the frame A34a and the frame B34b. The reason why the angle is set to α = 5 to 30 ° is that when the angle is larger than 30 °, the contact length between the energizing plate 37 and the second film 33 may be reduced, which may hinder electrical conduction. This is because the effective area where the three-layer film 31 functions as a three-layer becomes smaller if it is smaller than 0 °. In addition, the part corresponding to the electricity supply plate 37 of the frame A 34 a is formed obliquely with respect to the surface direction of the three-layer film 31 in consideration of the cutting angle of the three-layer film 31. Further, at least one end of the energizing plate 37 protrudes to the outside of the frame 34 as an energizing terminal 38, and the energizing terminal 38 is connected to the high-voltage power source 3 via a lead wire (not shown) or the like, whereby the second film 33 can be reliably connected to the high-voltage power source 3. Thereby, reliability can be improved.

  In this method, the surface exposed portion 36 of the three-layer film 31 can be formed by post-processing after forming the three-layer structure of the film, so the three-layer film 31 can be molded in a large area in a large area, The manufacturing cost of the three-layer film can be reduced.

(Embodiment 3)
5, in FIGS. 1 and 2, the electrode plate comprising a three-layer film 31 for use in the ground electrode plate 1 3 of the charging unit 11 is a detailed view and a cross-sectional view showing a third embodiment. The same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted. The electrode plate not using the three-layer film 31 may be a metal plate such as stainless steel or aluminum.

  In FIG. 5, the three-layer film 31 is configured by sandwiching a second film 33 between two first films 32. Here, as a material of the first film 32 and the second film 33, a polyvinylidene fluoride resin having a thickness of 100 to 500 μm is used. The periphery of the three-layer film 31 is sandwiched between rigid frames 34 (frame A34a, frame B34b) such as metal or resin, and fastened by passing bolts and nuts (not shown) through four holes 35, Maintains rigidity.

  The frame A 34 a is provided with four bosses 41 provided with female screws 41 a in the direction perpendicular to the surface direction of the three-layer film 31 on the inner surface. The boss 41 is inserted into the three-layer film 31 in a wedge shape by screwing a conductive current bar 42 having a conical shape with a sharp tip 42a and a male screw 42b at the center. Here, the reason why the tip 42a of the current-carrying rod 42 is conical is that the force that always enlarges the hole of the second film 33 works in the portion where the current-carrying rod 42 contacts the second film 33. This is because the current-carrying rod 42 and the second film 33 are reliably brought into contact with each other even if the thickness is small (100 to 500 μm). By connecting the current-carrying rod 42 to the high-voltage power supply 3 via a lead wire (not shown) or the like, the second film 33 can be reliably connected to the high-voltage power supply 3. Thereby, reliability can be improved.

  In this method, the second film 33 can be reliably conducted to the high-voltage power source 3 without processing the already formed three-layer film 31, and an electrode plate using the three-layer film 31 can be manufactured. It is cheap and can be performed easily.

(Embodiment 4)
6 is used for any one or a plurality of types of the ground electrode plate 13 of the charging unit 11, the load electrode plate 22 of the dust collection unit 21, and the ground electrode plate 23 of the dust collection unit 21 in FIGS. It is the detail drawing and sectional drawing which show Embodiment 4 of the electrode plate containing the three-layer film 31. The same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted. The electrode plate not using the three-layer film 31 may be a metal plate such as stainless steel or aluminum.

  In FIG. 6, the three-layer film 31 is configured by sandwiching a second film 33 between two first films 32. Here, as a material of the first film 32 and the second film 33, a polyvinylidene fluoride resin having a thickness of 100 to 500 μm is used. The periphery of the three-layer film 31 is sandwiched between rigid frames 34 (frame A34a, frame B34b) such as metal or resin, and fastened by passing bolts and nuts (not shown) through four holes 35, Maintains rigidity.

  The frame A 34 a is provided with four bosses 41 provided with female threads 41 a on the inner surface in a direction parallel to the surface direction of the three-layer film 31. The conductive boss 42 having a conical shape with a sharp tip 42a and a male screw 42b at the center is screwed into the boss 41 so that the boss 41 is inserted into the second film 33 of the three-layer film 31 in a wedge shape. is there. Here, the reason why the tip 42a of the current-carrying rod 42 is conical is that a force that always enlarges the hole of the second film 33 acts on the part where the current-carrying rod 42 contacts the second film 33, This is because the two films 33 are brought into contact with each other with certainty. By connecting the current-carrying rod 42 to the high-voltage power supply 3 via a lead wire (not shown) or the like, the second film 33 can be reliably connected to the high-voltage power supply 3. Thereby, reliability can be improved.

  In this method, the second film 33 can be more reliably conducted to the high-voltage power source 3 without processing the already formed three-layer film 31. Production of an electrode plate using the three-layer film 31 is possible. Is cheap and can be performed easily.

  INDUSTRIAL APPLICABILITY The present invention is effective for an electric dust collector that processes a large amount of air, and can provide an electric dust collector that can reduce the weight. It is also effective when processing airborne particulate matter containing flammable substances, and an electric dust collector that can be collected safely without causing spark discharge. Can be provided.

Configuration diagram of an electric dust collector showing Embodiments 1 to 4 of the present invention The perspective view of the charging part and dust collection part which show Embodiment 1-4 of this invention Drawing of a pole plate showing Embodiment 1 of the present invention (a detailed view of a pole plate, (b) sectional view of a pole plate) Drawing of a pole plate showing Embodiment 2 of the present invention ((a) Detailed view of a pole plate, (b) Cross section of a pole plate) Drawing of a pole plate showing Embodiment 3 of the present invention ((a) Detailed view of a pole plate, (b) Cross section of a pole plate) Drawing of a pole plate showing Embodiment 4 of the present invention ((a) Detailed view of a pole plate, (b) Cross section of a pole plate) Configuration diagram showing a conventional electrostatic precipitator

Explanation of symbols

2 Blower 3 High Voltage Power Supply 11 Charging Portion 12 Discharge Electrode 13 Ground Electrode Plate 21 Dust Collection Portion 22 Load Electrode Plate 23 Ground Electrode Plate 31 3 Layer Film 32 First Film 33 Second Film 34 Frame 36 Surface Exposed Portion 37 Current Plate 41a Female Screw 42 Current bar 42a Tip 42b Male screw

Claims (8)

Discharge electrode and ground electrode plate are stacked in parallel to the air flow direction, and the charging unit that charges the suspended particulate matter in the air, the load electrode plate and the ground electrode plate are stacked in parallel to the air flow direction. A dust collecting portion for collecting suspended particulate matter in the air charged by the charging portion; a blower for allowing air containing suspended particulate matter to flow into the charging portion and the dust collecting portion; and a high-voltage power supply for supplying a high voltage to the dust collecting unit and the charging unit in order to collect the material, the ground electrode plate of the charging portion, between the first film of semiconductive two consists of a second film sandwiched three-layer film of electrically conductive, wherein the ground electrostatic electrode plate provided with a surface exposed portion of the second film, the surface exposed energized plate electrically connected to cause the high-voltage power supply The second film is electrically connected to the high-voltage power source. So as to the volume resistivity of the first film is ¹⁰ 9 ^{~10 12 Ω} · cm, the volume resistivity of the second film is less than 10 ⁴ Ω · cm, both of the film also has a thickness in 100~500μm An electric dust collector. 3-layer film of the electrode plate, according to claim 1 having a surface exposed portion which is composed of only two layers of one first film and one of the second film in a predetermined width in parallel to the end face of at least one side serial electrostatic precipitator of the mounting. 3. The electric dust collector according to claim 2 , wherein a surface exposed portion is formed by cutting obliquely at an angle of 5 to 30 degrees with respect to the surface direction of the three-layer film at an end face of at least one side of the three-layer film of the electrode plate. Machine. The electric dust collector according to claim 2 or 3 , wherein a frame is provided around the three-layer film of the electrode plate, and a current plate is sandwiched between the frames. Discharge electrode and ground electrode plate are stacked in parallel to the air flow direction, and the charging unit that charges the suspended particulate matter in the air, the load electrode plate and the ground electrode plate are stacked in parallel to the air flow direction. A dust collecting portion for collecting suspended particulate matter in the air charged by the charging portion; a blower for allowing air containing suspended particulate matter to flow into the charging portion and the dust collecting portion; and a high-voltage power supply for supplying a high voltage to the dust collecting unit and the charging unit in order to collect the material, the ground electrode plate of the charging portion, between the first film of semiconductive two sandwiching the second film of electrically conductive is constituted by a three-layer film, by inserting the energizing rod said electrically conductive is not on the high-voltage power supply perpendicular or parallel to the surface direction of the three-layer film of the grounding conductive plate, Bringing the current-carrying rod into contact with the second film; The film so as to electrically conduct to the high voltage power supply, the volume resistivity of the first film is 10 ⁹ ~10 ¹² Ω · cm, the volume resistivity of the second film is less than 10 ⁴ Ω · cm, All the films are electrostatic precipitators having a thickness of 100 to 500 μm . 6. The electric dust collector according to claim 5 , wherein the current-carrying rod has a conical shape with a sharp tip, and is inserted in a wedge shape with respect to the three-layer film. A frame is provided around the three-layer film of the electrode plate, and the frame is provided with at least as many screws as the number of current-carrying rods. By screwing the current-carrying rods into the screws, the frame is wedge-shaped. The electric dust collector according to claim 6 , wherein the electric dust collector is inserted. Each of the first film and the second film is a polyvinylidene fluoride resin, and each film has an electric resistance adjusted by mixing an ionic conductive agent into the base material, and the respective films are thermally welded. 3-layer film is constituted electrostatic precipitator according to any one of claims 1-7.

Images